Question

masura a doua unghiuri complementare sunt direct proportionale cu numerele 4 si 8. aflati masura fiecaruia dintre ele.

Answer 1

A+B=90 de grade 
A/4+B/8=K
A+B/12=K
90/12=K
K=7,5
A=7,5*4=30 de grade 
B=7,5*8=60 de grade

Answer 2

(A,B)d.p(4,8)⇒A+B=90 ⇔A/4=B/8=K ⇔A=4K;B=8K ⇔4K+8K=90⇔12K=90        K=90:12⇔K=7,5 ⇔A=7,5·4=30;B=7,5·8=60